1) Biofuels are the only path to carbon neutral jet fuel. I think if we give up international travel we will lose far more than we gain. Nothing fuels xenophobia more than not having a clear idea of who the foreigners actually are.
2) Biofuels plus CCS (carbon capture and sequestration) is, as far as I can tell, the only plausible path to near term reduction in atmospheric CO2. I hear a lot of talk about 350 and that's interesting, but most people with "350" hats don't seem to have a plan to move the number down from the 450 we have already bought.
But things aren't easy, and despite the fact that global warming looms over everything, we can't be indifferent to other problems, especially other global problems.
I have heard no sensible defenses of corn-based ethanol, even though politicians from the "aah" states (including President Obama) continue to champion it. But here is a side of it that is terrifying. Via Minnesota Public Radio via Big Biofuels Blog (h/t David Benson):
Mark von Keitz with the University of Minnesota's Biotechnology Institute said in ethanol production, the main enemy is a bacterial bug that makes lactic acid.
"What these organisms do is they also compete with the yeast for the sugar," said von Keitz. "But instead of making alcohol, they make primarily lactic acid."
"What people operating these plants are trying to do is to keep these lactic acid bacteria in check," said von Keitz. "And one way of doing that is with the help of antibiotics."
Ethanol producers use penicillin and a popular antibiotic called virginiamycin to kill bacteria. And that raises two potential concerns.
One is that these treatments might promote the growth of bacteria that are resistant to antibiotics. The development of these "superbugs" is a major concern in health care because they reduce the effectiveness of medicines.
Mark von Keitz found some bacteria that were, in fact, resistant when he sampled bacteria at four Midwest ethanol plants several years ago.
The second concern is that the antibiotics could find their way to humans through the food chain.
Distillers grain is a major source of low-cost livestock feed. Any restrictions on its sale and use as feed will hurt the profit-scarce ethanol industry and the livestock farmers who rely on it.
Charlie Staff, executive director of the Distillers Grain Technology Council, said distillers grain is one of the few dependable moneymakers left for the ethanol industry.
"If they didn't have distillers grain as a revenue, many more of them wouldn't be able to operate," said Staff.
Yikes! An object lesson that everything is connected. Plus another argument against agribusiness-produced meat.
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